CN105911097B - Multichannel film type gas sensitive response test device - Google Patents
Multichannel film type gas sensitive response test device Download PDFInfo
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- CN105911097B CN105911097B CN201610264748.1A CN201610264748A CN105911097B CN 105911097 B CN105911097 B CN 105911097B CN 201610264748 A CN201610264748 A CN 201610264748A CN 105911097 B CN105911097 B CN 105911097B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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Abstract
The present invention relates to gas sensitive testing fields, a kind of multichannel film type gas sensitive response test device is provided, the device includes gas test cavity, sealing ring, sample cell cover board and several pairs of metal electrode bars, sealing ring is arranged between gas test cavity and sample cell cover board, through-hole is provided on sample cell cover board, metal electrode bar passes through through-hole and is fixedly connected with sample cell cover board.Technical solution proposed by the present invention uses direct insertion electrode, can reduce the loss of electric current, convenient for capturing response signal, sensitivity with higher and lesser measurement error.
Description
Technical field
The invention belongs to gas sensitive testing field, in particular to a kind of multichannel film type gas sensitive response test dress
It sets.
Background technique
The detection of inorganic gas is the important technical and a great technical problem of security monitoring, general easy
Therefore combustion, explosive dangerous material, can contain the inorganic gas in air and specific environment along with the release and adhesion of inorganic gas
Amount, which carries out fast and accurately in situ measurement, to have broad application prospects, and gas sensor is that a kind of realization inorganic gas is real-time
The short-cut method of detection.
Micro- atmosphere detection technique develops to the direction of intelligent, miniaturization and portability, the research of gas sensor
Increasingly paid attention to.The research of gas sensor be unable to do without the preparation of gas sensitive and means of testing improves, and develops air-sensitive material
Material and sensor need to investigate its response performance to gas with various, and gas response test device is wherein essential test group
Part.
Currently, the focus that scientific research personnel both domestic and external tests gas sensitive is mostly in the sensitivity of gas material, stabilization
The precision of property and test equipment, generally uses simple single channel test chamber for gas response test device, reliability
Not high, precision is low, and testing efficiency is low；Minority has the test macro of multiple channel test chamber, and the method for static distribution of arranging in pairs or groups needs
It is equipped with closed large volume gas chamber, so that the desorption time of sample gas is long, is not suitable for carrying out a large amount of gas test.
Summary of the invention
[technical problems to be solved]
The multi-channel gas that the object of the present invention is to provide a kind of structures is simple, convenient and practical, testing result is reliable and stable
Response test device.
[technical solution]
The present invention is achieved by the following technical solutions.
The present invention relates to a kind of multichannel film type gas sensitive response test devices, including gas test cavity, sealing
Circle, sample cell cover board and several pairs of metal electrode bars, the sealing ring are arranged between gas test cavity and sample cell cover board,
Through-hole is provided on the sample cell cover board, the metal electrode bar passes through through-hole and is fixedly connected with sample cell cover board.It is described
The side of gas test cavity is provided with air inlet and venthole, convenient for the intracavitary background gas of gas test and object gas plus
It carries.The present invention can be improved the leakproofness of sample cell gas, prevent gas from gas test cavity and sample by setting sealing ring
It reveals the junction of product pond cover board.
As a preferred embodiment, the bottom setting of the gas test cavity is fluted.The groove is for putting
The insulating bodies such as quartz glass plate are set, prevent the bottom end hard contact of metal electrode bar from directly contacting with gas test cavity bottom
And lead to short circuit.
As another preferred embodiment, four angles of the groove are arc-shaped.
As another preferred embodiment, each pair of metal electrode bar is evenly distributed by minimum spacing.The present invention
By the way that multipair inserted metal electrode stem is arranged, each pair of metal electrode distance between tie rods is equal, and makes on the basis of meeting test condition
Spacing between each pair of metal electrode bar is minimum.
As another preferred embodiment, the metal electrode bar includes fixed part, telescopic rod and bottom end gold
Belong to contact, the fixed part is located at the top of sample cell cover board and is fixedly connected with sample cell cover board.Wherein metal electrode bar
Length is greater than housing depth, and metal electrode bar end portion has telescopic nature, can carry out pressure point according to film sample height
It is flexible, by being pressed on thin-film material, so that it is not generated positional shift to fix thin-film material.
As another preferred embodiment, the bottom end metal for the metal electrode bar installed in the sample cell cover board is touched
Point is semicircle.Sample caused by semicircular contact can effectively prevent hard contact to contact with sample scratches, fails.
As another preferred embodiment, the fixed part of the metal electrode bar passes through logical on sample cell cover board
Hole and polytetrafluoroethylene (PTFE) nut are fixedly connected with sample cell cover board.
As another preferred embodiment, the shape of the sealing ring is rectangular-ambulatory-plane.The size and gas of sealing ring
It is identical to test cavity edge, there is certain elasticity and compressibility, guarantees that gas test sample cell has good air-tightness.
As another preferred embodiment, the making material of the sealing ring is silicon rubber.
As another preferred embodiment, the making material of the sample cell cover board be organic glass, stainless steel or
Polytetrafluoroethylene (PTFE).
[beneficial effect]
Technical solution proposed by the present invention has the advantages that
(1) present invention uses direct insertion electrode, can reduce the loss of electric current, convenient for capturing response signal, has higher
Sensitivity and lesser measurement error.
(2) present invention is evenly distributed by minimum spacing by each pair of electrode on the basis of meeting test condition, makes spacing most
It is small, realize cavity minimum, it is ensured that cavity has lesser dead volume, has ensured the steady flow and diffusion of gas.
(3) present invention is integrated with multipair direct insertion electrode, can test a variety of gas sensitives, substantially increase simultaneously
Testing efficiency, while the electrode has Automatic-reset high-precision contact, it can be ensured that pressure is balanced, is conducive to keep signal steady
It is fixed, it ensure that the reliability of data.
Detailed description of the invention
Fig. 1 is the structural representation for the multichannel film type gas sensitive response test device that the embodiment of the present invention one provides
Figure.
Fig. 2 is the structural schematic diagram for the sample cell cover board that the embodiment of the present invention one provides.
Fig. 3 is the structural schematic diagram for the gas test cavity that the embodiment of the present invention one provides.
Fig. 4 is the structural schematic diagram for the sample cell cover board that the embodiment of the present invention one provides.
Fig. 5 is the structural schematic diagram for the gas test cavity that the embodiment of the present invention one provides.
Fig. 6 is the cross-sectional view for the multichannel film type gas sensitive response test device that the embodiment of the present invention one provides.
Fig. 7 is the structural schematic diagram for the sealing ring that the embodiment of the present invention one provides.
Description of symbols: 11- metal electrode bar；111- fixed part；112- polytetrafluoroethylene (PTFE) nut；113- is scalable
Bar；The bottom end 114- hard contact；12- screw；13- sample cell cover board；14- sealing ring；151- air inlet；152- venthole；16-
Gas test cavity；161- shell；162- screw hole；163- groove；6- quartz glass substrate.
Specific embodiment
It to make the object, technical solutions and advantages of the present invention clearer, below will be to a specific embodiment of the invention
Carry out clear, complete description.
Fig. 1 and Fig. 6 is the structure for the multichannel film type gas sensitive response test device that the embodiment of the present invention one provides
Schematic diagram.As shown in Figure 1, the test device includes gas test cavity 16, sealing ring 14, sample cell cover board 13 and eight pairs of metals
Electrode stem 11, wherein sealing ring 14 is arranged between gas test cavity 16 and sample cell cover board 13, specifically, as shown in fig. 7,
The shape of sealing ring 14 is rectangular-ambulatory-plane, and the size of sealing ring 14 is consistent with 16 marginal dimension of gas test cavity, gas test chamber
16 edge of body has eight screw holes 162, and wherein 1 screw hole is respectively arranged in 16 edge quadrangle of gas test cavity, and every long side is each
2 screw holes are set, and this distribution mode makes the uniform force on gas test cavity 16 of sealing ring 14, it is ensured that gas is surveyed
Try cavity 16 has good sealing performance during gas test.In addition, sealing ring 14 and gas test cavity 16 and sample
It is fixed by screw 12 and screw hole 162 between product pond cover board 13.Furthermore it is possible to sealing ring 14 be made using silicon rubber, due to silicon
Rubber has certain elasticity and compressibility, it is ensured that gas test sample cell has good air-tightness, close by being arranged
The leakproofness of sample cell gas can be improved in seal 14, prevents gas from the company of gas test cavity 16 and sample cell cover board 13
Connect place's leakage.
Fig. 2 and Fig. 4 is that the structural schematic diagram of sample cell cover board 13 is arranged on sample cell cover board 13 as shown in Figure 2 and Figure 4
There are eight pairs of through-holes, as shown in fig. 6, metal electrode bar 11 is direct insertion metal electrode bar comprising fixed part 111, scalable
Bar 113 and bottom end hard contact 114, fixed part 111 are located at the top of sample cell cover board 13 and fix with sample cell cover board 13
Connection, specifically, the fixed part of metal electrode bar 11 by the through-hole of sample cell cover board 13 and polytetrafluoroethylene (PTFE) nut 112 with
Sample cell cover board 13 is fixedly connected.In the present embodiment, 11 length of metal electrode bar is greater than 16 height of gas test cavity, metal electricity
11 end portion of pole bar has telescopic nature, can carry out pressure point according to film sample height and stretch, by being pressed on film material
On material, it is set not generate positional shift to fix thin-film material.The bottom end hard contact 114 of metal electrode bar 11 is semicircle,
Sample caused by semicircular contact can effectively prevent bottom end hard contact 114 to contact with sample scratches, fails.In addition, each right
Metal electrode bar 11 is evenly distributed by minimum spacing, and the embodiment of the present invention is equal by making each pair of 11 spacing of metal electrode bar, and
Make the spacing between each pair of metal electrode bar 11 minimum on the basis of meeting test condition, realize cavity minimum, it is ensured that
Cavity has lesser dead volume, in addition, due to being integrated with eight pairs of direct insertion metal electrode bars 11, it can be simultaneously to up to eight kinds of gas
Quick material is tested, and is greatly improved work efficiency.In addition, the making material of sample cell cover board 13 is to have in the present embodiment
Machine glass, stainless steel or polytetrafluoroethylene (PTFE).
Fig. 3 and Fig. 5 is the structural schematic diagram of gas test cavity 16.As shown in Figure 3 and Figure 5, gas test cavity 16 wraps
Shell 161 is included, the side of gas test cavity 16 is provided with air inlet 151 and venthole 152, convenient in gas test cavity 16
The load of background gas and object gas.The bottom setting fluted 163 of gas test cavity, the shape of groove 163 are rectangular
Shape, four angles of groove 163 be it is arc-shaped, which prevents metal electric for placing the insulating bodies such as quartz glass plate
The hard contact of pole bar 11 is directly contacted with 16 bottom of gas test cavity leads to short circuit, in the present embodiment, places in groove 163
There is quartz glass substrate 6, the length and width of quartz glass substrate 6 are identical as the length and width of groove 163, since four angles of groove 163 are
It is arc-shaped, facilitate the placement and taking-up of quartz glass substrate 6, while will not influence the stability of the placement of quartz glass substrate 6.
Film sample when in use, is directly laid in 16 bottom groove 163 of gas test cavity by above-described embodiment
In quartz glass substrate 6, metal electrode bar 11 is made to compress film sample, sample cell cover board 13, sealing ring 14 and gas test chamber
Body 16 is fixedly connected by eight screws, it is ensured that sample does not move, while being convenient for changing sample.Sample cell cover board 13 collects
At eight pairs of direct insertion metal electrode bars 11, up to eight kinds of gas sensitives can be tested simultaneously, substantially increase work effect
Rate.In test, the flow for flowing through the air inlet 151 of gas test cavity 16 by gas flow control valve regulating gas is big
It is small, to control the gas gross in gas test cavity 16.The going out by gas test cavity 16 by gas is acted on by pressure
Stomata 152 is discharged.
As can be seen from the above embodiments, the embodiment of the present invention uses direct insertion electrode, can reduce the loss of electric current, just
In capture response signal, sensitivity with higher and lesser measurement error；In addition, the embodiment of the present invention is meeting test-strips
It is on the basis of part, each pair of electrode is evenly distributed by minimum spacing, keep spacing minimum, realizes cavity minimum, it is ensured that chamber
Body has lesser dead volume, has ensured the steady flow and diffusion of gas；Meanwhile the embodiment of the present invention is integrated with eight pairs of straight cuttings
Formula electrode can simultaneously test up to eight kinds of gas sensitives, substantially increase testing efficiency, while the electrode has automatically
Homing position type high-precision contact, it can be ensured that pressure is balanced, is conducive to keep signal stabilization, ensure that the reliability of data.
It is to be appreciated that the embodiment of foregoing description is a part of the embodiments of the present invention, rather than whole embodiments, also not
It is limitation of the present invention.Based on the embodiment of the present invention, those of ordinary skill in the art are not making the creative labor premise
Under every other embodiment obtained, belong to protection scope of the present invention.
Claims (7)
1. a kind of multichannel film type gas sensitive response test device, it is characterised in that including gas test cavity (16), close
Seal (14), sample cell cover board (13) and eight pairs of metal electrode bars (11), the sealing ring (14) are arranged in gas test cavity
(16) between sample cell cover board (13), through-hole is provided on the sample cell cover board (13), the metal electrode bar (11) is worn
It crosses through-hole and is fixedly connected with sample cell cover board (13), each pair of metal electrode bar (11) is evenly distributed by minimum spacing, institute
Stating metal electrode bar (11) includes fixed part (111), telescopic rod (113) and bottom end hard contact (114), the fixed part
(111) are divided to be located at the top of sample cell cover board (13) and be fixedly connected with sample cell cover board (13), the sample cell cover board (13)
The bottom end hard contact (114) of the metal electrode bar (11) of middle installation is semicircle；The side of the gas test cavity (16)
It is provided with air inlet (151) and venthole (152), insulating body is arranged in the bottom in the gas test cavity (16)；Test
When film sample be laid on the insulating body, so that the bottom end hard contact of metal electrode bar is compressed the film sample, eight
It is direct insertion electrode to metal electrode bar, up to eight kinds of gas sensitive can be tested simultaneously.
2. multichannel film type gas sensitive response test device according to claim 1, it is characterised in that the gas
Fluted (163) are arranged in the bottom for testing cavity (16), and the insulating body is placed in the groove.
3. multichannel film type gas sensitive response test device according to claim 2, it is characterised in that the groove
(163) four angles are arc-shaped.
4. multichannel film type gas sensitive response test device according to claim 1, it is characterised in that the metal
The fixed part (111) of electrode stem (11) passes through the through-hole and polytetrafluoroethylene (PTFE) nut (112) and sample on sample cell cover board (13)
Product pond cover board (13) is fixedly connected.
5. multichannel film type gas sensitive response test device according to claim 1, it is characterised in that the sealing
The shape for enclosing (14) is rectangular-ambulatory-plane.
6. multichannel film type gas sensitive response test device according to claim 1 or 5, it is characterised in that described close
The making material of seal (14) is silicon rubber.
7. multichannel film type gas sensitive response test device according to claim 1, it is characterised in that the sample
The making material of pond cover board (13) is organic glass, stainless steel or polytetrafluoroethylene (PTFE).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610264748.1A CN105911097B (en) | 2016-04-26 | 2016-04-26 | Multichannel film type gas sensitive response test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610264748.1A CN105911097B (en) | 2016-04-26 | 2016-04-26 | Multichannel film type gas sensitive response test device |
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| CN105911097A CN105911097A (en) | 2016-08-31 |
| CN105911097B true CN105911097B (en) | 2019-04-23 |
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| CN201610264748.1A Active CN105911097B (en) | 2016-04-26 | 2016-04-26 | Multichannel film type gas sensitive response test device |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442948A (en) * | 2016-10-27 | 2017-02-22 | 苏州仓旻电子科技有限公司 | Gas-sensitive ceramic testing device |
| CN108241006B (en) * | 2018-01-11 | 2023-05-12 | 重庆理工大学 | Gas-sensitive characteristic response curve testing device with stirring blades |
| CN108333235A (en) * | 2018-04-24 | 2018-07-27 | 郑州迪邦科技有限公司 | Gas analyzer shell and the gas analyzer for using the shell |
| CN109115965A (en) * | 2018-10-31 | 2019-01-01 | 常州市武进区半导体照明应用技术研究院 | A kind of multifunctional gas-sensitive dynamic checkout unit |
| CN110068576B (en) * | 2019-04-30 | 2021-07-27 | 北京大学 | Thermoelectric two-field in-situ atmosphere test system under optical microscope |
| CN111537670B (en) * | 2020-04-20 | 2022-06-10 | 中国科学院上海微系统与信息技术研究所 | Top contact type gas testing cavity and dynamic gas testing system applying same |
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| CN102384962A (en) * | 2011-11-09 | 2012-03-21 | 上海交通大学 | Gas sensor performance testing device |
| CN103293199A (en) * | 2013-05-21 | 2013-09-11 | 重庆大学 | Experimental device and method for testing gas-sensitive characteristics of titanium dioxide nanotube sensor |
| CN105021777A (en) * | 2015-07-31 | 2015-11-04 | 湖北大学 | Multifunctional gas sensor testing system |
| CN204855490U (en) * | 2015-07-31 | 2015-12-09 | 湖北大学 | Multi -functional gas sensor test system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000275203A (en) * | 1999-03-26 | 2000-10-06 | Yazaki Corp | Catalytic combustion type gas sensor |
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| CN201522468U (en) * | 2009-11-06 | 2010-07-07 | 南京工业大学 | Gas sensitivity measuring device for gas sensitive material |
| CN101762625A (en) * | 2010-01-19 | 2010-06-30 | 南京工业大学 | Gas sensitivity measuring device for gas sensitive material |
| CN102384962A (en) * | 2011-11-09 | 2012-03-21 | 上海交通大学 | Gas sensor performance testing device |
| CN103293199A (en) * | 2013-05-21 | 2013-09-11 | 重庆大学 | Experimental device and method for testing gas-sensitive characteristics of titanium dioxide nanotube sensor |
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